<!DOCTYPE html>
<html>
  <head>
    <style>
      body {
        background-color: #ffffff;
      }
    </style>
    <title>IOT LAO WANG</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
  </head>
  <body>
    <h1>This is heading 1</h1>
    <p>Hello World, hello coder!</p>
    <p><b>Another bold paragraph.</b></p>
    <p><em>This text is italic</em></p>
    <p>This is <sub>subscripted</sub> text.</p>
    <p>This is <sup>superscripted</sup> text.</p>
    <p>Before horizontal line</p>
    <hr>
    <p>After horizontal line.</p>
  </body>
</html>